APA استشهاد

Ritter, D. F., & Kochel, R. C. M. (2002). Process geomorphology (4th ed.). Mc Graw hill.

استشهاد بنمط شيكاغو

Ritter, Dale F., و R. Craig Miller Kochel. Process Geomorphology. 4th ed. Boston: Mc Graw hill, 2002.

MLA استشهاد

Ritter, Dale F., و R. Craig Miller Kochel. Process Geomorphology. 4th ed. Mc Graw hill, 2002.